JPS615972A - Printing-controlling system - Google Patents

Abstract

PURPOSE:To fix a printing position in the case wherein a serial impact printer being stably fed is stopped and printing is conducted, by providing a means for shifting a printing timing when stopping a carriage. CONSTITUTION:A processor 1 so controls that when a command for stopping the carriage being stably fed is supplied to a spacing pulse motor 5, a type-selecting driving circuit 6 is supplied with a printing timing shifted from that in the case of stopping the carriage being intermittently fed, by a timer 3 provided in a ROM2, and printing is conducted after the carriage is completely stopped. Accordingly, disordered printing is prevented from occurring when printing after stopping the carriage is fed for printing.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a serial impact printer that selects and prints printed characters, and in particular, a carriage that positions the selected printed characters at a printing position changes from running printing to stationary printing. The present invention relates to a printing control method that prevents printing from being disturbed by not stopping at a predetermined position when moving.

Normally, each time a serial impact printer prints a character, it performs character selection to select the next character to be printed.
Next, the carriage is moved to position the selected type at the position to be printed, and then the carriage is stopped and printed. When the type is provided on a cylinder or disk, for example, and the cylinder or disk is rotated to select the required type,
There are differences in the time required for type selection. That is, selecting adjacent characters is fast, but becomes slower as the amount of rotation increases.

In order to improve printing processing efficiency, there is a method in which the carriage is moved at a constant speed to print or stopped to print depending on the printing selection time. In other words, when the type selection time is short, the carriage is moved at a constant speed, and when the selected type reaches the printing position, the pants are driven to print.When the type selection time is long, the carriage is stopped at the printing position. There is a method of printing based on completion of type selection.

When the printer has both the functions of running printing and sequential stop printing in this way, it is important that there is no disturbance in the printing position between constant speed running printing and sequential stop printing.

[Conventional technology]

FIG. 2 is a diagram illustrating the running state of the carriage when a pulse motor is used.

The vertical axis S represents the moving speed of the carriage, and the horizontal axis represents time. By switching the excitation phase of the pulse motor and sequentially applying pulses to each excitation phase, the carriage is accelerated and moves to a constant speed travel region in the range D.

This constant speed running region is when the type selection time is short;
Print while moving the carriage at a constant speed.

For example, if it takes time to select the next type after printing at position A, in order to stop the carriage at position B, the period of pulses given to each excitation phase of the pulse motor is lengthened. and lock the pulse motor at point B.

After locking the pulse smoke at point B, after a certain period of time has elapsed, the hammer is driven to print, and then the pulse motor is driven again to move the carriage and select the next type, but this also takes time. stops the carry/7ji at 0 points. Then, the pulse motor is locked at the 0 point, and printing is performed after a certain period of time has elapsed as described above. Therefore, the carriage accelerates and then decelerates. In this way, when the carriage is stopped from running at a constant speed, and when it is stopped during intermittent running where it stops at point B and stops at point 0, the former is better than the latter when the carriage is decelerated from the constant speed of the pulse motor. There was a problem with the connection, and I didn't give it enough time to lock.
The carriage is swinging in the stopped position for a long time.

FIG. 3 is a diagram illustrating a state in which the carriage stops from running at a constant speed.

As mentioned above, after printing at point A, the carriage decelerates and stops at point B, but even if the pulse smoke is locked, the carriage moves from stop position B to overshoe 1- due to variations in the inertia of the drive system including the pulse motor. or undershoot. That is, as shown in the figure, it vibrates before and after the stop position B.

[Problem that the invention seeks to solve]

When stopping the carriage from constant speed running as described above,
It takes time for the carriage to come to a complete stop, and the vibration period is also unstable due to variations in the drive system, so as shown in Figure 3, the pulse motor is locked in the same way as when stopping during intermittent running. If the characters are printed after a certain period of time

[Means for solving problems]

The problem mentioned above is that in a serial impact printer that has both the functions of running printing and sequential stop printing, a means is provided to keep the printing timing from shifting when the carriage is stopped. This problem is solved by the printing control method according to the present invention, which is shifted.

[Effect]

That is, it is noted that when printing is performed after stopping from a running printing state, the printing disturbance is large, and only in this case, the printing timing is shifted until the movement of the carriage subsides.

〔Example〕

FIG. 1 is a block diagram of a circuit showing one embodiment of the present invention.

The processor 1 reads a program from the ROM 2 and operates. The processor 1 receives print data from the host device via the interface control circuit 15. Based on this print data, a character selection pulse motor 7 is driven via a character selection drive circuit 6 to select characters to be printed, and when the carriage reaches the printing position, the characters are printed. At the same time, the space pulse motor 5 is driven via the space drive circuit 4 to move the carriage. Then, the character selection time is calculated and the carriage is caused to travel at a constant speed or intermittently as described above.

The processor 1 also drives a paper feed pulse motor 9 via a paper feed drive circuit 8 to feed the printing paper at a predetermined location and sequentially perform a paper feed operation.

Furthermore, the ribbon feed motor 11 is driven via the ribbon feed drive circuit 10 to feed out the ribbon.

Then, if necessary, the ribbon lift magnet 13 is driven via the ribbon lift drive circuit 12 to change the color of the ribbon. The state of each motor at this time is reported to the processor 1 by the sensor 14, and the processor 1 controls each of the drive circuits based on the information from the sensor 14.

Here, when the processor 1 gives a command to the space pulse motor 5 to stop the carriage from running at a constant speed, R
A timer 3 provided in the OMZ gives printing timing to the character selection drive circuit 6 compared to the case where the carriage stops after intermittent running, and prints after the carriage has completely stopped.

〔Effect of the invention〕

As explained above, the present invention improves print quality by eliminating disturbances in the print position when printing after stopping from constant speed running with a serial impact printer that has both running printing and sequential stop printing functions. I can do it.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a circuit showing an embodiment of the present invention, Fig. S2 is a diagram illustrating the running state of the carriage when a pulse motor is used, and Fig. 3 is a diagram illustrating the carriage running state when the carriage stops from running at a constant speed. It is a figure explaining a state. In the figure, ■ is Bromo 7, and 2 is ROM. 3 is a timer, 4 is a space drive circuit, 5 is a space motor, 7 is a type selection pulse smoke, 8 is a paper feed drive circuit, 9 is a paper feed pulse motor, 10 is a ribbon feed drive circuit, 11 is a ribbon feed motor, 12 is a ribbon 13 is a ribbon lift magnet; 14 is a sensor; and 15 is an interface sensor circuit. 1P i Kuniko 2 Ward

Claims (1)

[Claims] In a serial impact printer that has both the functions of running printing and sequential stop printing, a means is provided for shifting the printing timing when the carriage stops, and when printing after stopping from running printing, the printing timing is shifted. control method.